Door-interlocking device



Oct. I14 1930. J. c. MccUNE 1,778,117

DOOR INTERLOCKI NG DEVI CE Filed May 25, 1928 2 Sheets-Sheet l 34 35 F'4l 2 l l -F-I I '3 f 7- l f 5 I INVENTOR ATTOR EY 0d. i4, 1930; J, C,MCCUNE 1,778,111

DOOR INTERLOCKING DEVICE Filed May 25, 1928 2 Sheets-S116, 2

JOSEPH QMCCUNE ATTORNEY Patented Oct. 14, 1930 UNITEDSTATES PATENTOFFICE JOSEPH o. MGCUNE, OP EDGEWOOIJ, PENNSYLVANIA, AssIGNoRTo THEWEs'IINGHoUsE AIR BRAKE COMPANY, OP WILMERDING, PENNSYLVANIA, ACORPORATION OE PENNSYLVANIA Applicatioii med May 25,

y tionglfFig. 2 a sectional View of Ithe brake Valve device, showing therotary valve in brake application position; Fig. 3 a sectional vie'wofthe brake valve device, 'showingthe rotary ,valve in thecardoor openingposition and Fig. 4 audiagrammatioview of a car door and brakecontrolling equipment, showing a Vslight` modification of my invention.y

The equipment shown in Fig 1 confiprisesv 26 a brake valve device 1having a casing With a adapted to be operatedby. a vhandle 4.

Adoor, engine 'isfprovided comprising a casing having a piston cylindercontaining pistons 6 and '7 connected byfa stem Sand adapted uponvmovement in one direction to eii'ect the closingjof the v'car vdoorsand upon movement in the opposite direction to etlect theopening ofthecar doors. y y fThe equipment.includesavalve device 9. comprising acasing having a piston chamber 10 containinga pistonll and avalve'chambei' 12 connected ,toa pipev13 leading tothe mainvreserv'oir14 .and-,containing` a slide valve 15 'adapted toy beoperated by' piston 11. r' QA magnetvalve device controls .the iiuid Ypressure in piston chamberl() and comprises y, a magnet 16 andy doublebeat valves.` 17 and '.18'v adapted to be 'operated by'said magnet. IThe circuitof magnet 16fis controlled-by 4a'-counterelectro-motive*force relay 19, the relayy being adapted `whenenergized to mainf tain the circuit of magnet 16 open and whensubstantiallydeenergized` to. close said circuit; A,relay 20 is adaptedwhen the car isrunning and current supplied to the carv motor 21 toclose acircuit fromthe source of curj rent, througha resistance 22-tothe relay 19 and Whencurrent is 'cut oifrom thecarmotor 5 `rto closeacircuit through the car motor to valve chamber 2 containing a'rotaryvalve 3 DOOR-INTERLOCKING DEVICE 192,8. Serial No. 280,493.

the relay 19, so that the energization of the relay 19 depends upon thecounterelectroniotive force generated by the motor.

In the release positionl ofthev brake valve device 1, as shown in Fig.1, the usual brake pipe 23 is connected through port 24 in the rotaryvalve with valve chamber 2, which chamber is charged with Huid `underpressure, as supplied through pipe 25 from the main reservoir. 14. Thepiston 601i the door engine is subject to brakepipe pressure, assuppliedthrough cavity 26, in the rotary valve, and pipe 27. The piston 7 isconnected through pipe 28 and cavity 29 in the rotary valve 3With anatmospheric exhaust port30; The pistons 6 and? are therefore shifted tothe right, as shown in Fig. 1, in which position the car door or doorsare'held closed by the door engine. i E

The straight air pipe 31, which is connected to the usual brake cylinder32, is connected through cavity 29 with exhaust port 30, so

that the brake cylinder is at atmospheric pressure.

Ifthe car motor ,issupplied with current in the usual manner, and isrunning along the road, the relay 20 will be deenergized and Will be ina position opposite to that shown in Fig. 1,sovthat, a circuit is closedthrough the relay 19 and the resistance 22, fromthe source of current. z

',When it is desired to stopthe car, the brake valve deviceisturned tobrake application position, as shown in Fig. 2, in'which a port 33 inthe rotary valve `connects valve chamber 2 with straight air pipe 31.'.Fluid under pressure istherefore supplied to the brake cylinder 32 toleii'ect an application of the brakes. In this position, the door closingpipe 27 is still connected, through cavity 34 with the brake pipe `23,While the door opening pipe 28 isconnected through cavity v35 with eX-haust port 30, so that the door engine ismaintained in its'door closingposition.

. The supply of current being cut oil'. from the` car motor 21, Whilethe car is being brought to a stop, the relay 2.0l is deenergized andwill assume the position shown in Fig. '1, in which a circuit is closed,so that the counvof exhaust port 39.

yterelectro-motive force of the motor acts to energize the relay 19.VWith the relay 19v energized, the circuit of magnet 16 is held open andthe valve 18 is seated, While the valve 17 is unseated. With the valve17 unseated, the piston chamber l ,is vented to the atmosphere at portV216, so that piston` 11 `is mains tained in its left hand Fig. 1.

.Illytllispositiom ypip-e 37 isconnected! .through k@SLVityBS with .anexhaust port 89 so that if fluid under pressure should be supplied topipe 28, it Would notbuild up a f pressure on the door opening piston 7of the door engine, since fluid would AloW'past the check valve and tothe atmosphere Aby Way "Ii, therefore, 'While' the car is being broughtto a stop anda counterelezctrok-motive force is generated by the motor21, su'ilicient to energize. the relay 19, the brake valve shouldbeturned to thev door opening'position, as shown in Fig. 3,`the.doorengine will not be operated to lopen the car doors, al-

-y though in this position, a'port 41k in vthe rotary valve connects thevalve chamber 2` With the door opening pipe 28,7while cavity 42 connectsthe door closing pipev27 With eir-V haust port 30. v .y g

When, however, the car has been brought practically toastop, thecounterelectro-motive force Will not bie Vsi'itlicient to energize the'relay' 19 and the; relay will thenoperate to close a circuit-forenergizing the magnet 16. llVith the Ymagnet 16 energized,=the valve V17`vvill be seated, While the valve 18 Will be unseated,so that fluidunder pressure from the main yreservoir 14 Will be supplied to pis! Yvton'ehamber `10. Thepiston 11`will then be Q1 (If thev pressure shiftedto therright by the aid of spring in lWhich position,lthe cavity38'in1slide'valve 15, connects pipe 37 With'pipe 13. Y

',.If the brake valverdevice is now turned to'the door opening position,Huidiunder pressure supplied tothe door opening pipe 28 WilllbeAprevented from escaping by Way of pipe 37 and exhaust port 39,250 thatthe doorvengine Will then be'shifted to the left,-

to'thereby-effec't theop'e'ning ofthe ear door. v in' the" brakecylinder "82' Was not .builtrup to agpredeterrnined4 degree c vvhenthe'bralresfvvere*previously applied to stop #the car',the pressure Willbe built up 'by fiovv frmthe pipe 28 past a pressure limiting valvedevice 44 to the brake cylinder.VV Whenthe pressure in the brakecylinder has been Y yincreased 5to la predetermined degree, the

dev-ice; f

spring45 Will operateltofhold thecheck valvel 46 -o' f the closed.; Y y.l According .to the equipment-'shown in' iglf 4.0i? the drawings, thevalve device 9 is -dispensedlivith andthe 'door vopening pipe 28 i.connected .directly to 'the magnet`r i valve 'pressure limiting' 'valvedevice position, as shown in` Veration of operating said mechanismto,effect the ope lVith this arrangement, so long as the rep lay 19 isheld energized by the counterelectro-motiveforce and the magnet 16 ismaintainedk deenergized,y the pipe 47 is open to the atmospheric port36, so that iiuid under pressure, if supplied tol the door opening pipe28, Would be ventedby flow past the check valve 40 and through pipe 47to the atmospheric port 3G,thus preventing the opthe door engine tofopen the vcar door. i 'Y' Y When the magnet 16 is energizedupon thedeenergization of the relay 19, the valve 17 seats, while the valve 18unseats, so that fluid Aunder.pressure'iroin the mainreservoir 14 iioWsfrom pipe `25topipe 47 andr operates to hold the check valve. 40 seated.l r 2 Fluid under pressure supplied to the door opening pipe 28 Willthen be effective tooperate the door engine 5 and thus cause the cardoors to be opened.v Fluid under pressure supplied to pipe 47 also flowspast the pressure limiting check valve V46 t0, thebrake cylinder 3,2, sothat the bralrecylinder pres.- sure 'is built up toa point such that thespring ing of ythe 'car door, valve means operative fr0 Prevent theOpration. Off Saidlinechesmlte open the car door,fel ectrica llyvcont/rolled" means adapted up'on'energization .to' effect theloperation ofvsaid; valve means and means controlled by .theco'unterelectromotive force i f of theu vehicle motor for controlling'the cifre cuit of saijdelectrically controlled Qmeansipg. 2,. Inacontrolling apparatus foravmotorf driven vehicle, the combinationvvithadcr s engine; operated'byHuid`r under pressure for I eifectingtheopeningof a. car door',` offazman ually operated valve' device havinglan alvv'afysV open pipel'lthroiigh Which'iiid u 'nde'rl sure is'supplied to,` said door engine, .valve means Jfor normally 'connectingsaidpipfto the atmosphere, and electrically contre'lled means forcontrolling the operation v of said valve means. f y i 1 'i In acontrolling'apparatus for a meter *drivenV vehicle, the combinationvWith a ,door

engine operated under pressurejfor effecting the opening pija.:carfdoor, 'Qff al manually operated valve fdevice, j pipe 'prop-pviding' an unobstructed'connection'betvveen ai the terms f f tliroughWhich iuid under pressure is sup-v plied to the door. engine byoperation of said valve device, valve means for controllingcommunication from said pipe to the atmosphere, electrically controlledmeans for controllingthe operation of said valve means, and meanscontrolled by the counterelectromotive force of the vehicle motor forcontrolling the circuit of said electrically controlled means.

4. The combination With a door engine op'- erated by fluid underpressure for controlling the opening and closing of a car door, of amanually operated valve ydevice for controlling the fluidpressure onsaid door engine, a door opening pipe connecting said valve device withsaid door engine, a door closing pipe connectingsaid valve device withsaid door engine, a magnet valve device operated when deenergized toconnect said door opening pipe rto the atmosphere, and means ener.-gized by the counterelectro-motive force of the car motorfor controllingthe circuit of Y said magnet valve device.

` 5. Inra car door and brake controlling apparatus, the combination witha brake cylinder and a door engine operated by fluid under pressure foreffectingthe opening of a car door, of a manually operated valve devicefor supplying fluid under pressure to said door engine, valve meansoperative in one position to prevent the l.building up of fluid pressureon said door engine andin another position to supply fluid underpressure to the brake cylinder and to permit the building up of fluidpressure on said door engine, and

Y electrically controlled means forcontrolling Y the operation of saidvalve means.

In testimony whereof I have hereunto set i my hand,this 22nd day of May,1928.

JOSEPH C. MOCUNE.

